├── .gitignore ├── Cargo.toml ├── LICENSE ├── README.md └── src ├── chunk.rs ├── io ├── chunk.rs ├── mod.rs └── value.rs ├── lib.rs └── movie.rs /.gitignore: -------------------------------------------------------------------------------- 1 | /target/ 2 | **/*.rs.bk 3 | Cargo.lock 4 | -------------------------------------------------------------------------------- /Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | name = "earthquake" 3 | version = "0.1.0" 4 | authors = ["djsrv "] 5 | description = "Library for reading and modifying Director files" 6 | homepage = "https://github.com/Earthquake-Project/earthquake-rust" 7 | repository = "https://github.com/Earthquake-Project/earthquake-rust" 8 | readme = "README.md" 9 | license = "Apache-2.0" 10 | 11 | [dependencies] 12 | byteorder = "1.2.1" 13 | serde = "1.0.25" 14 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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2 | 3 | // Chunk 4 | 5 | pub struct Chunk { 6 | pub fourcc: String, 7 | pub variant: ChunkVariant, 8 | } 9 | 10 | // ChunkVariant 11 | 12 | pub enum ChunkVariant { 13 | Meta(Meta), 14 | InitialMap(InitialMap), 15 | MemoryMap(MemoryMap), 16 | Unimplemented, 17 | } 18 | 19 | // Meta 20 | 21 | #[derive(Debug)] 22 | pub struct Meta { 23 | pub codec: String, 24 | } 25 | 26 | // InitialMap 27 | 28 | #[derive(Debug)] 29 | pub struct InitialMap { 30 | pub entry_count: u32, 31 | pub entries: Vec, 32 | } 33 | 34 | // MemoryMap 35 | 36 | #[derive(Debug)] 37 | pub struct MemoryMap { 38 | pub unknown0: u16, 39 | pub unknown1: u16, 40 | pub chunk_count_max: u32, 41 | pub chunk_count_used: u32, 42 | pub junk_pointer: i32, 43 | pub unknown2: i32, 44 | pub free_pointer: i32, 45 | pub entries: Vec, 46 | } 47 | 48 | #[derive(Debug)] 49 | pub struct MemoryMapEntry { 50 | pub fourcc: String, 51 | pub length: u32, 52 | pub offset: u32, 53 | pub padding: i16, 54 | pub unknown0: i16, 55 | pub link: i32, 56 | } 57 | -------------------------------------------------------------------------------- /src/io/chunk.rs: -------------------------------------------------------------------------------- 1 | extern crate byteorder; 2 | 3 | use byteorder::ReadBytesExt; 4 | use io::value::*; 5 | use chunk::*; 6 | 7 | use std::{self, fmt}; 8 | use std::io::{Cursor, SeekFrom}; 9 | use std::io::prelude::*; 10 | 11 | // ReadChunks 12 | 13 | pub trait ReadChunks { 14 | fn read_chunk(&mut self, fourcc: String, length: Option) -> Result; 15 | fn read_rifx(&mut self) -> Result; 16 | fn read_imap(&mut self) -> Result; 17 | fn read_mmap(&mut self) -> Result; 18 | } 19 | 20 | impl<'a> ReadChunks for Cursor<&'a [u8]> { 21 | fn read_chunk(&mut self, expected_fourcc: String, expected_length: Option) -> Result { 22 | let offset = self.position(); 23 | let fourcc = self.read_fourcc::()?; 24 | let mut length = self.read_u32::()?; 25 | 26 | // Validate chunk 27 | if let Some(n) = expected_length { 28 | if n != length || expected_fourcc != fourcc { 29 | return Err(ReadChunkError::UnexpectedChunk( 30 | UnexpectedChunkError::KnownLength(offset, expected_fourcc, n, fourcc, length) 31 | )); 32 | } 33 | } else { 34 | if expected_fourcc != fourcc { 35 | return Err(ReadChunkError::UnexpectedChunk( 36 | UnexpectedChunkError::UnknownLength(offset, expected_fourcc, fourcc, length) 37 | )); 38 | } 39 | } 40 | 41 | if fourcc == "RIFX" { 42 | // Pretend RIFX is only 12 bytes long 43 | // This is because offsets are relative to the beginning of the file 44 | // Whereas everywhere else they're relative to chunk start 45 | length = 4; 46 | } 47 | 48 | let data_offset = self.position() as usize; 49 | let slice = &self.get_ref()[data_offset..data_offset+(length as usize)]; 50 | self.seek(SeekFrom::Current(length as i64))?; 51 | let mut rdr = Cursor::new(slice.clone()); 52 | 53 | let variant = match fourcc.as_ref() { 54 | "RIFX" => rdr.read_rifx::()?, 55 | "imap" => rdr.read_imap::()?, 56 | "mmap" => rdr.read_mmap::()?, 57 | _ => ChunkVariant::Unimplemented, 58 | }; 59 | 60 | Ok(Chunk { 61 | fourcc: fourcc, 62 | variant: variant, 63 | }) 64 | } 65 | 66 | fn read_rifx(&mut self) -> Result { 67 | let codec = self.read_fourcc::()?; 68 | Ok(ChunkVariant::Meta(Meta { 69 | codec: codec, 70 | })) 71 | } 72 | 73 | fn read_imap(&mut self) -> Result { 74 | let entry_count = self.read_u32::()?; 75 | let mut entries = vec![0u32; entry_count as usize]; 76 | for i in 0..(entry_count as usize) { 77 | entries[i] = self.read_u32::()?; 78 | } 79 | Ok(ChunkVariant::InitialMap(InitialMap { 80 | entry_count: entry_count, 81 | entries: entries, 82 | })) 83 | } 84 | 85 | fn read_mmap(&mut self) -> Result { 86 | let unknown0 = self.read_u16::()?; 87 | let unknown1 = self.read_u16::()?; 88 | let chunk_count_max = self.read_u32::()?; 89 | let chunk_count_used = self.read_u32::()?; 90 | let junk_pointer = self.read_i32::()?; 91 | let unknown2 = self.read_i32::()?; 92 | let free_pointer = self.read_i32::()?; 93 | let mut entries = Vec::new(); 94 | for _i in 0..(chunk_count_used as usize) { 95 | let fourcc = self.read_fourcc::()?; 96 | let length = self.read_u32::()?; 97 | let offset = self.read_u32::()?; 98 | let padding = self.read_i16::()?; 99 | let unknown0 = self.read_i16::()?; 100 | let link = self.read_i32::()?; 101 | let entry = MemoryMapEntry { 102 | fourcc: fourcc, 103 | length: length, 104 | offset: offset, 105 | padding: padding, 106 | unknown0: unknown0, 107 | link: link, 108 | }; 109 | entries.push(entry); 110 | } 111 | Ok(ChunkVariant::MemoryMap(MemoryMap { 112 | unknown0: unknown0, 113 | unknown1: unknown1, 114 | chunk_count_max: chunk_count_max, 115 | chunk_count_used: chunk_count_used, 116 | junk_pointer: junk_pointer, 117 | unknown2: unknown2, 118 | free_pointer: free_pointer, 119 | entries: entries, 120 | })) 121 | } 122 | } 123 | 124 | // UnexpectedChunkError 125 | 126 | pub enum UnexpectedChunkError { 127 | KnownLength(u64, String, u32, String, u32), 128 | UnknownLength(u64, String, String, u32), 129 | } 130 | 131 | impl fmt::Debug for UnexpectedChunkError { 132 | fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { 133 | match *self { 134 | UnexpectedChunkError::KnownLength(offset, ref expected_fourcc, expected_length, ref fourcc, length) => { 135 | write!( 136 | f, "at offset {} expected a {} chunk with length {}, but got a {} chunk with length {}", 137 | offset, expected_fourcc, expected_length, fourcc, length 138 | ) 139 | }, 140 | UnexpectedChunkError::UnknownLength(offset, ref expected_fourcc, ref fourcc, length) => { 141 | write!( 142 | f, "at offset {} expected a {} chunk of unknown length, but got a {} chunk with length {}", 143 | offset, expected_fourcc, fourcc, length 144 | ) 145 | }, 146 | } 147 | } 148 | } 149 | 150 | // ReadChunkError 151 | 152 | pub enum ReadChunkError { 153 | IOError(std::io::Error), 154 | ReadStringError(ReadStringError), 155 | UnexpectedChunk(UnexpectedChunkError), 156 | } 157 | 158 | impl From for ReadChunkError { 159 | fn from(e: std::io::Error) -> ReadChunkError { 160 | ReadChunkError::IOError(e) 161 | } 162 | } 163 | 164 | impl From for ReadChunkError { 165 | fn from(e: ReadStringError) -> ReadChunkError { 166 | ReadChunkError::ReadStringError(e) 167 | } 168 | } 169 | 170 | impl From for ReadChunkError { 171 | fn from(e: UnexpectedChunkError) -> ReadChunkError { 172 | ReadChunkError::UnexpectedChunk(e) 173 | } 174 | } 175 | 176 | impl fmt::Debug for ReadChunkError { 177 | fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { 178 | match *self { 179 | ReadChunkError::IOError(ref e) => e.fmt(f), 180 | ReadChunkError::ReadStringError(ref e) => e.fmt(f), 181 | ReadChunkError::UnexpectedChunk(ref e) => e.fmt(f), 182 | } 183 | } 184 | } 185 | -------------------------------------------------------------------------------- /src/io/mod.rs: -------------------------------------------------------------------------------- 1 | pub mod value; 2 | pub mod chunk; 3 | -------------------------------------------------------------------------------- /src/io/value.rs: -------------------------------------------------------------------------------- 1 | extern crate byteorder; 2 | 3 | use byteorder::{BigEndian, LittleEndian}; 4 | 5 | use std::fmt; 6 | use std::io::{self, Cursor}; 7 | use std::string::FromUtf8Error; 8 | use std::io::prelude::*; 9 | 10 | // ReadDirectorValues 11 | 12 | pub trait ReadDirectorValues { 13 | fn read_string(&mut self, length: usize) -> Result; 14 | fn read_fourcc(&mut self) -> Result; 15 | } 16 | 17 | impl<'a> ReadDirectorValues for Cursor<&'a [u8]> { 18 | fn read_string(&mut self, length: usize) -> Result { 19 | let mut buf = vec![0; length]; 20 | self.read_exact(&mut buf)?; 21 | let string = String::from_utf8(buf)?; 22 | Ok(string) 23 | } 24 | 25 | fn read_fourcc(&mut self) -> Result { 26 | let mut buf = vec![0; 4]; 27 | self.read_exact(&mut buf)?; 28 | let fourcc = B::read_fourcc(buf)?; 29 | Ok(fourcc) 30 | } 31 | } 32 | 33 | // ByteOrder extension 34 | 35 | pub trait ByteOrder: byteorder::ByteOrder { 36 | fn read_fourcc(buf: Vec) -> Result; 37 | } 38 | 39 | impl ByteOrder for BigEndian { 40 | fn read_fourcc(buf: Vec) -> Result { 41 | String::from_utf8(buf) 42 | } 43 | } 44 | 45 | impl ByteOrder for LittleEndian { 46 | fn read_fourcc(buf: Vec) -> Result { 47 | String::from_utf8(vec![buf[3], buf[2], buf[1], buf[0]]) 48 | } 49 | } 50 | 51 | // ReadStringError 52 | 53 | pub enum ReadStringError { 54 | IOError(io::Error), 55 | Utf8Error(FromUtf8Error), 56 | } 57 | 58 | impl From for ReadStringError { 59 | fn from(e: io::Error) -> ReadStringError { 60 | ReadStringError::IOError(e) 61 | } 62 | } 63 | 64 | impl From for ReadStringError { 65 | fn from(e: FromUtf8Error) -> ReadStringError { 66 | ReadStringError::Utf8Error(e) 67 | } 68 | } 69 | 70 | impl fmt::Debug for ReadStringError { 71 | fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { 72 | match *self { 73 | ReadStringError::IOError(ref e) => e.fmt(f), 74 | ReadStringError::Utf8Error(ref e) => e.fmt(f), 75 | } 76 | } 77 | } 78 | -------------------------------------------------------------------------------- /src/lib.rs: -------------------------------------------------------------------------------- 1 | extern crate byteorder; 2 | 3 | pub mod movie; 4 | mod io; 5 | mod chunk; 6 | -------------------------------------------------------------------------------- /src/movie.rs: -------------------------------------------------------------------------------- 1 | use chunk::*; 2 | 3 | use byteorder::{BigEndian, LittleEndian}; 4 | use chunk::Chunk; 5 | use io::value::*; 6 | use io::chunk::*; 7 | 8 | use std::collections::HashMap; 9 | use std::fmt; 10 | use std::io::Cursor; 11 | 12 | // Movie 13 | 14 | pub struct Movie { 15 | chunks: HashMap, 16 | } 17 | 18 | impl Movie { 19 | pub fn read(buf: &[u8]) -> Result { 20 | let mut rdr = Cursor::new(buf); 21 | let header = match rdr.read_fourcc::() { 22 | Ok(v) => v, 23 | Err(_e) => return Err(ReadMovieError::InvalidHeader), 24 | }; 25 | rdr.set_position(0); 26 | let chunks = match header.as_ref() { 27 | "RIFX" => read_chunks::(&mut rdr)?, 28 | "XFIR" => read_chunks::(&mut rdr)?, 29 | _ => return Err(ReadMovieError::InvalidHeader), 30 | }; 31 | Ok(Movie { 32 | chunks: chunks, 33 | }) 34 | } 35 | } 36 | 37 | fn read_chunks(mut rdr: &mut Cursor<&[u8]>) -> Result, ReadMovieError> { 38 | let mut chunks = HashMap::new(); 39 | 40 | let mmap = lookup_mmap::(&mut rdr)?; 41 | if let ChunkVariant::MemoryMap(ref mmap_struct) = mmap.variant { 42 | for i in 0..mmap_struct.chunk_count_used { 43 | // Note: RIFX, imap, and mmap are re-parsed for simplicity's sake 44 | let mmap_entry = &mmap_struct.entries[i as usize]; 45 | rdr.set_position(mmap_entry.offset as u64); 46 | if mmap_entry.fourcc != "free" && mmap_entry.fourcc != "junk" { 47 | let chunk = rdr.read_chunk::(mmap_entry.fourcc.clone(), Some(mmap_entry.length))?; 48 | chunks.insert(i, chunk); 49 | } 50 | } 51 | } 52 | 53 | Ok(chunks) 54 | } 55 | 56 | fn lookup_mmap(rdr: &mut Cursor<&[u8]>) -> Result { 57 | let meta = rdr.read_chunk::("RIFX".to_string(), None)?; 58 | if let ChunkVariant::Meta(ref meta_struct) = meta.variant { 59 | if meta_struct.codec != "MV93" { 60 | return Err(ReadMovieError::UnsupportedCodec(meta_struct.codec.clone())); 61 | } 62 | } 63 | 64 | let imap = rdr.read_chunk::("imap".to_string(), None)?; 65 | let mmap_offset = if let ChunkVariant::InitialMap(ref imap_struct) = imap.variant { 66 | imap_struct.entries[0] 67 | } else {unreachable!()}; 68 | 69 | rdr.set_position(mmap_offset as u64); 70 | let mmap = rdr.read_chunk::("mmap".to_string(), None)?; 71 | 72 | Ok(mmap) 73 | } 74 | 75 | // ReadMovieError 76 | 77 | pub enum ReadMovieError { 78 | InvalidHeader, 79 | UnsupportedCodec(String), 80 | ReadChunkError(ReadChunkError), 81 | } 82 | 83 | impl From for ReadMovieError { 84 | fn from(e: ReadChunkError) -> ReadMovieError { 85 | ReadMovieError::ReadChunkError(e) 86 | } 87 | } 88 | 89 | impl fmt::Debug for ReadMovieError { 90 | fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { 91 | match *self { 92 | ReadMovieError::InvalidHeader => write!(f, "invalid header"), 93 | ReadMovieError::UnsupportedCodec(ref codec) => write!(f, "unsupported codec: {}", codec), 94 | ReadMovieError::ReadChunkError(ref e) => e.fmt(f), 95 | } 96 | } 97 | } 98 | 99 | --------------------------------------------------------------------------------